// 类
class Student {
  constructor(name, number) {
    this.name = name
    this.number = number
    // this.gender = 'male'
  }

  sayHi() {
    console.log(
        `姓名 ${this.name} ，学号 ${this.number}`
    )
    // console.log(
    //     '姓名 ' + this.name + ' ，学号 ' + this.number
    // )
  }

  // study() {

  // }
}

// 通过类 new 对象/实例
const xialuo = new Student('夏洛', 100)
console.log(xialuo.name)
console.log(xialuo.number)
xialuo.sayHi()

const madongmei = new Student('马冬梅', 101)
console.log(madongmei.name)
console.log(madongmei.number)
madongmei.sayHi()
